JPS57162514A - Filter circuit - Google Patents

Filter circuit

Info

Publication number
JPS57162514A
JPS57162514A JP4617681A JP4617681A JPS57162514A JP S57162514 A JPS57162514 A JP S57162514A JP 4617681 A JP4617681 A JP 4617681A JP 4617681 A JP4617681 A JP 4617681A JP S57162514 A JPS57162514 A JP S57162514A
Authority
JP
Japan
Prior art keywords
signal
signals
complex
self
units
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4617681A
Other languages
Japanese (ja)
Inventor
Naoki Suehiro
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP4617681A priority Critical patent/JPS57162514A/en
Publication of JPS57162514A publication Critical patent/JPS57162514A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

PURPOSE:To extract a pulse type signal having a narrow width of time with no side lobe, by multiplying a prescribed complex coefficient by an input signal applied by the prescribed modulation and then obtaining the total sum of the self-correlation function signals. CONSTITUTION:A time series complex signal having the length (n) is supplied to an input terminal 1 and branched by a branching means 2 into N units of time series complex signals. These N units of complex signals are supplied to complex coefficient multiplying means 31-3N to obtain the multiplication of a time change complex coefficient of exp{j2pi(i-1)(k-1)/N}. The output signal of the complex coefficient multiplying means is supplied to each of matching filters 41-4N that delivers the self-correlation function signal of a supplid signal. The self-correlation function signals of N units of time series signals obtained through the filters 41-4N are added together by an adder 5. The total sum of N units of self-correlation function signals is turned into a pulse type signal having a narrow width of time with no side lobe.
JP4617681A 1981-03-31 1981-03-31 Filter circuit Pending JPS57162514A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4617681A JPS57162514A (en) 1981-03-31 1981-03-31 Filter circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4617681A JPS57162514A (en) 1981-03-31 1981-03-31 Filter circuit

Publications (1)

Publication Number Publication Date
JPS57162514A true JPS57162514A (en) 1982-10-06

Family

ID=12739713

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4617681A Pending JPS57162514A (en) 1981-03-31 1981-03-31 Filter circuit

Country Status (1)

Country Link
JP (1) JPS57162514A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4947576A (en) * 1972-09-01 1974-05-08
JPS5215212A (en) * 1975-07-23 1977-02-04 Codex Corp Receiver
JPS5414261A (en) * 1977-07-04 1979-02-02 Nippon Telegr & Teleph Corp <Ntt> Coded pulse ultrasonic wave transmitter receiver

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4947576A (en) * 1972-09-01 1974-05-08
JPS5215212A (en) * 1975-07-23 1977-02-04 Codex Corp Receiver
JPS5414261A (en) * 1977-07-04 1979-02-02 Nippon Telegr & Teleph Corp <Ntt> Coded pulse ultrasonic wave transmitter receiver

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